INFO: task syz-executor.2:11449 blocked for more than 143 seconds. Not tainted 5.15.0-rc3-syzkaller #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:syz-executor.2 state:D stack:27792 pid:11449 ppid: 6691 flags:0x00004004 Call Trace: context_switch kernel/sched/core.c:4940 [inline] __schedule+0x940/0x26f0 kernel/sched/core.c:6287 schedule+0xd3/0x270 kernel/sched/core.c:6366 schedule_timeout+0x1db/0x2a0 kernel/time/timer.c:1857 do_wait_for_common kernel/sched/completion.c:85 [inline] __wait_for_common kernel/sched/completion.c:106 [inline] wait_for_common kernel/sched/completion.c:117 [inline] wait_for_completion_timeout+0x171/0x280 kernel/sched/completion.c:157 usb_start_wait_urb+0x144/0x4c0 drivers/usb/core/message.c:63 usb_bulk_msg+0x226/0x550 drivers/usb/core/message.c:387 do_proc_bulk+0x3a3/0x750 drivers/usb/core/devio.c:1236 proc_bulk drivers/usb/core/devio.c:1273 [inline] usbdev_do_ioctl drivers/usb/core/devio.c:2547 [inline] usbdev_ioctl+0x586/0x36c0 drivers/usb/core/devio.c:2713 vfs_ioctl fs/ioctl.c:51 [inline] __do_sys_ioctl fs/ioctl.c:874 [inline] __se_sys_ioctl fs/ioctl.c:860 [inline] __x64_sys_ioctl+0x193/0x200 fs/ioctl.c:860 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x35/0xb0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x44/0xae RIP: 0033:0x7f10d6b108d9 RSP: 002b:00007f10d4087188 EFLAGS: 00000246 ORIG_RAX: 0000000000000010 RAX: ffffffffffffffda RBX: 00007f10d6c14f60 RCX: 00007f10d6b108d9 RDX: 0000000020000080 RSI: 00000000c0185502 RDI: 0000000000000003 RBP: 00007f10d6b6acb4 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 00007f10d7148b2f R14: 00007f10d4087300 R15: 0000000000022000 Showing all locks held in the system: 1 lock held by khungtaskd/26: #0: ffffffff8b97fde0 (rcu_read_lock){....}-{1:2}, at: debug_show_all_locks+0x53/0x260 kernel/locking/lockdep.c:6446 1 lock held by systemd-journal/2958: #0: ffff8880b9c31a58 (&rq->__lock){-.-.}-{2:2}, at: raw_spin_rq_lock_nested+0x1e/0x30 kernel/sched/core.c:474 1 lock held by in:imklog/6222: #0: ffff888079e714f0 (&f->f_pos_lock){+.+.}-{3:3}, at: __fdget_pos+0xe9/0x100 fs/file.c:990 ============================================= NMI backtrace for cpu 0 CPU: 0 PID: 26 Comm: khungtaskd Not tainted 5.15.0-rc3-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 Call Trace: __dump_stack lib/dump_stack.c:88 [inline] dump_stack_lvl+0xcd/0x134 lib/dump_stack.c:106 nmi_cpu_backtrace.cold+0x47/0x144 lib/nmi_backtrace.c:105 nmi_trigger_cpumask_backtrace+0x1ae/0x220 lib/nmi_backtrace.c:62 trigger_all_cpu_backtrace include/linux/nmi.h:146 [inline] check_hung_uninterruptible_tasks kernel/hung_task.c:210 [inline] watchdog+0xc1d/0xf50 kernel/hung_task.c:295 kthread+0x3e5/0x4d0 kernel/kthread.c:319 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:295 Sending NMI from CPU 0 to CPUs 1: NMI backtrace for cpu 1 CPU: 1 PID: 2958 Comm: systemd-journal Not tainted 5.15.0-rc3-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 RIP: 0010:native_irq_disable arch/x86/include/asm/irqflags.h:40 [inline] RIP: 0010:arch_local_irq_disable arch/x86/include/asm/irqflags.h:75 [inline] RIP: 0010:arch_local_irq_save arch/x86/include/asm/irqflags.h:107 [inline] RIP: 0010:lock_is_held_type+0x54/0x140 kernel/locking/lockdep.c:5664 Code: c0 0f 85 c8 00 00 00 65 4c 8b 24 25 40 f0 01 00 41 8b 94 24 f4 09 00 00 85 d2 0f 85 af 00 00 00 48 89 fd 41 89 f6 9c 8f 04 24 48 c7 c7 80 fc 8b 89 31 db e8 fd 0d 00 00 41 8b 84 24 f0 09 00 RSP: 0018:ffffc9000221f888 EFLAGS: 00000246 RAX: 0000000000000000 RBX: ffffc9000221fc38 RCX: 0000000000000001 RDX: 0000000000000000 RSI: 00000000ffffffff RDI: ffffffff8b97fde0 RBP: ffffffff8b97fde0 R08: 0000000000000000 R09: ffff8880b9d32a0b R10: ffffed10173a6541 R11: 0000000000000000 R12: ffff88807b448000 R13: 00000000ffffffff R14: 00000000ffffffff R15: ffffc9000221fc60 FS: 00007f55ce3528c0(0000) GS:ffff8880b9d00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007f55cbbd7008 CR3: 000000001a829000 CR4: 00000000003526e0 Call Trace: hlist_bl_first_rcu include/linux/rculist_bl.h:24 [inline] __d_lookup_rcu+0x3bb/0x6c0 fs/dcache.c:2298 lookup_fast+0xe1/0x6d0 fs/namei.c:1580 walk_component+0xcf/0x6a0 fs/namei.c:1966 link_path_walk.part.0+0x757/0xd00 fs/namei.c:2297 link_path_walk fs/namei.c:2222 [inline] path_parentat+0xb1/0x1c0 fs/namei.c:2496 filename_parentat+0x1bb/0x5a0 fs/namei.c:2519 filename_create+0xa1/0x480 fs/namei.c:3639 do_mkdirat+0x94/0x300 fs/namei.c:3900 __do_sys_mkdir fs/namei.c:3931 [inline] __se_sys_mkdir fs/namei.c:3929 [inline] __x64_sys_mkdir+0xf2/0x140 fs/namei.c:3929 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x35/0xb0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x44/0xae RIP: 0033:0x7f55cd60d687 Code: 00 b8 ff ff ff ff c3 0f 1f 40 00 48 8b 05 09 d8 2b 00 64 c7 00 5f 00 00 00 b8 ff ff ff ff c3 0f 1f 40 00 b8 53 00 00 00 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 8b 0d e1 d7 2b 00 f7 d8 64 89 01 48 RSP: 002b:00007fff31a82ba8 EFLAGS: 00000293 ORIG_RAX: 0000000000000053 RAX: ffffffffffffffda RBX: 00007fff31a85c10 RCX: 00007f55cd60d687 RDX: 0000000000000000 RSI: 00000000000001ed RDI: 000055dd7c8138a0 RBP: 00007fff31a82be0 R08: 000055dd7ad263e5 R09: 0000000000000018 R10: 0000000000000069 R11: 0000000000000293 R12: 0000000000000000 R13: 0000000000000001 R14: 000055dd7c8138a0 R15: 00007fff31a83220 ---------------- Code disassembly (best guess): 0: c0 0f 85 rorb $0x85,(%rdi) 3: c8 00 00 00 enterq $0x0,$0x0 7: 65 4c 8b 24 25 40 f0 mov %gs:0x1f040,%r12 e: 01 00 10: 41 8b 94 24 f4 09 00 mov 0x9f4(%r12),%edx 17: 00 18: 85 d2 test %edx,%edx 1a: 0f 85 af 00 00 00 jne 0xcf 20: 48 89 fd mov %rdi,%rbp 23: 41 89 f6 mov %esi,%r14d 26: 9c pushfq 27: 8f 04 24 popq (%rsp) * 2a: fa cli <-- trapping instruction 2b: 48 c7 c7 80 fc 8b 89 mov $0xffffffff898bfc80,%rdi 32: 31 db xor %ebx,%ebx 34: e8 fd 0d 00 00 callq 0xe36 39: 41 rex.B 3a: 8b .byte 0x8b 3b: 84 24 f0 test %ah,(%rax,%rsi,8) 3e: 09 00 or %eax,(%rax)